A boy of mass 50 kg running at `5ms^-1` jumping a trolly of 20 kg travelling in the same direction `1.5 ms^-1`. Find their common velocity.

A 2 kg ball moving at 24 ms undergoes inelastic head on collision with a 4 kg ball moving in the opposite direction at 48 ms. If the coefficient of restitution is 2/3, their velocities in ms-after impact are

Convert 5m/min in ms^-1

A 2 kg body and a 3 kg body are moving along X-axis. At a particular instnat, the 2 kg body is 1 m from the origin and has a velocity of 3 ms^-1 and the 3 kg body is 2 m away from the origin has a velocity of -1 ms^-1 . Find the position and velocity of the centre of mass.

A bullet of mass 20 g moving with a speed of 500ms^(-1 ) strikes a wooden block of mass 1 kg and gets embedded in it. Find the speed with which block moves along with the bullet.

A girl riding a bicycle along a straight road with a speed of 5 ms^-1 throws a stone of mass 0.5 kg which has a speed of 15 ms^-1 with respect to the ground along her direction of motion. The mass of the girl and bicyle is 50 kg. Does the speed of the bicycle change after the stone is thrown? What is the change in speed, if so?

A boy of mass 18 kg is running with a speed of 12 km/h. Find the kinetic energy possessed by the boy.

A hockey ball of mass 200 g travelling at 10 ms^( -1) is struck by a hockey stick so as to return it along its original path with a velocity at 5ms^( -1) . Calculate the change in momentum occurred in the motion of hockey ball by the force applied by hockey stick.